Perimeter formulas
Here, find the perimeter formulas for some regular polygons. A regular polygon is a polygon with equal sides and equal angles.
If we let s be the length of one sides, we can find the perimeter as demonstrated in this lesson
Equilateral triangle:
Perimeter = s + s + s
Perimeter = 3 × s
For example, if s = 4 inches, Perimeter = 3 × 4 = 12 inches
Rhombus:
Perimeter = s + s + s + s
Perimeter = 4 × s
For example, if s = 5 meters, Perimeter = 4 × 5 = 20 meters
Square:
Perimeter = s + s + s + s
Perimeter = 4 × s
For example, if s = 6 meters, Perimeter = 4 × 6 = 24 meters
Regular pentagon:
Perimeter = s + s + s + s + s
Perimeter = 5 × s
For example, if s = 8 feet, Perimeter = 5 × 8 = 40 feet
Regular hexagon:
Perimeter = s + s + s + s + s + s
Perimeter = 6 × s
For example, if s = 5 feet, Perimeter = 6 × 5 = 30 feet

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